From 470c2f5953af8cce9071341181052406f43488f0 Mon Sep 17 00:00:00 2001
From: badlogic <badlogicgames@gmail.com>
Date: Thu, 18 Apr 2019 18:21:49 +0200
Subject: [PATCH] [csharp] Ported rotated mesh region UV loading. See #1327.

---
 spine-csharp/src/Atlas.cs                     | 10 +++-
 .../src/Attachments/AtlasAttachmentLoader.cs  |  1 +
 .../src/Attachments/MeshAttachment.cs         | 46 +++++++++++++++----
 3 files changed, 46 insertions(+), 11 deletions(-)

diff --git a/spine-csharp/src/Atlas.cs b/spine-csharp/src/Atlas.cs
index 5dd20a10a..b37952106 100644
--- a/spine-csharp/src/Atlas.cs
+++ b/spine-csharp/src/Atlas.cs
@@ -153,7 +153,14 @@ namespace Spine {
 					region.name = line;
 					region.page = page;
 
-					region.rotate = Boolean.Parse(ReadValue(reader));
+					string rotateValue = ReadValue(reader);
+					if (rotateValue == "true")
+						region.degrees = 90;
+					else if (rotateValue == "false")
+						region.degrees = 0;
+					else
+						region.degrees = int.Parse(rotateValue);
+					region.rotate = region.degrees == 90;
 
 					ReadTuple(reader, tuple);
 					int x = int.Parse(tuple[0]);
@@ -300,6 +307,7 @@ namespace Spine {
 		public int originalWidth, originalHeight;
 		public int index;
 		public bool rotate;
+		public int degrees;
 		public int[] splits;
 		public int[] pads;
 
diff --git a/spine-csharp/src/Attachments/AtlasAttachmentLoader.cs b/spine-csharp/src/Attachments/AtlasAttachmentLoader.cs
index b9ebdf54d..2b88fd489 100644
--- a/spine-csharp/src/Attachments/AtlasAttachmentLoader.cs
+++ b/spine-csharp/src/Attachments/AtlasAttachmentLoader.cs
@@ -69,6 +69,7 @@ namespace Spine {
 			attachment.RegionU2 = region.u2;
 			attachment.RegionV2 = region.v2;
 			attachment.RegionRotate = region.rotate;
+			attachment.RegionDegrees = region.degrees;
 			attachment.regionOffsetX = region.offsetX;
 			attachment.regionOffsetY = region.offsetY;
 			attachment.regionWidth = region.width;
diff --git a/spine-csharp/src/Attachments/MeshAttachment.cs b/spine-csharp/src/Attachments/MeshAttachment.cs
index 62c7cd703..f018d88a3 100644
--- a/spine-csharp/src/Attachments/MeshAttachment.cs
+++ b/spine-csharp/src/Attachments/MeshAttachment.cs
@@ -59,6 +59,7 @@ namespace Spine {
 		public float RegionU2 { get; set; }
 		public float RegionV2 { get; set; }
 		public bool RegionRotate { get; set; }
+		public int RegionDegrees { get; set; }
 		public float RegionOffsetX { get { return regionOffsetX; } set { regionOffsetX = value; } }
 		public float RegionOffsetY { get { return regionOffsetY; } set { regionOffsetY = value; } } // Pixels stripped from the bottom left, unrotated.
 		public float RegionWidth { get { return regionWidth; } set { regionWidth = value; } }
@@ -99,26 +100,51 @@ namespace Spine {
 			float[] regionUVs = this.regionUVs;
 			if (this.uvs == null || this.uvs.Length != regionUVs.Length) this.uvs = new float[regionUVs.Length];
 			float[] uvs = this.uvs;
+            float u = RegionU, v = RegionV, width = 0, height = 0;
 
-			if (RegionRotate) {
+			if (RegionDegrees == 90) {
 				float textureHeight = this.regionWidth / (RegionV2 - RegionV);
 				float textureWidth = this.regionHeight / (RegionU2 - RegionU);
-				float u = RegionU - (RegionOriginalHeight - RegionOffsetY - RegionHeight) / textureWidth;
-				float v = RegionV - (RegionOriginalWidth - RegionOffsetX - RegionWidth) / textureHeight;
-				float width = RegionOriginalHeight / textureWidth;
-				float height = RegionOriginalWidth / textureHeight;
+				u -= (RegionOriginalHeight - RegionOffsetY - RegionHeight) / textureWidth;
+				v -= (RegionOriginalWidth - RegionOffsetX - RegionWidth) / textureHeight;
+				width = RegionOriginalHeight / textureWidth;
+				height = RegionOriginalWidth / textureHeight;
 
 				for (int i = 0, n = uvs.Length; i < n; i += 2) {
 					uvs[i] = u + regionUVs[i + 1] * width;
-					uvs[i + 1] = v + height - regionUVs[i] * height;
+					uvs[i + 1] = v + (1 - regionUVs[i]) * height;
+				}
+			} else if (RegionDegrees == 180) {
+				float textureWidth = this.regionWidth / (RegionU2 - RegionU);
+				float textureHeight = this.regionHeight / (RegionV2 - RegionV);
+				u -= (RegionOriginalWidth - RegionOffsetX - RegionWidth) / textureWidth;
+				v -= RegionOffsetY / textureHeight;
+				width = RegionOriginalWidth / textureWidth;
+				height = RegionOriginalHeight / textureHeight;
+
+				for (int i = 0, n = uvs.Length; i < n; i += 2) {
+					uvs[i] = u + (1 - regionUVs[i]) * width;
+					uvs[i + 1] = v + (1 - regionUVs[i + 1]) * height;
+				}
+			} else if (RegionDegrees == 270) {
+				float textureWidth = this.regionWidth / (RegionU2 - RegionU);
+				float textureHeight = this.regionHeight / (RegionV2 - RegionV);
+				u -= RegionOffsetY / textureWidth;
+				v -= RegionOffsetX / textureHeight;
+				width = RegionOriginalHeight / textureWidth;
+				height = RegionOriginalWidth / textureHeight;
+
+				for (int i = 0, n = uvs.Length; i<n; i += 2) {
+					uvs[i] = u + (1 - regionUVs[i + 1]) * width;
+					uvs[i + 1] = v + regionUVs[i] * height;
 				}
 			} else {
 				float textureWidth = this.regionWidth / (RegionU2 - RegionU);
 				float textureHeight = this.regionHeight / (RegionV2 - RegionV);
-				float u = RegionU - RegionOffsetX / textureWidth;
-				float v = RegionV - (RegionOriginalHeight - RegionOffsetY - RegionHeight) / textureHeight;
-				float width = RegionOriginalWidth / textureWidth;
-				float height = RegionOriginalHeight / textureHeight;
+				u -= RegionOffsetX / textureWidth;
+				v -= (RegionOriginalHeight - RegionOffsetY - RegionHeight) / textureHeight;
+				width = RegionOriginalWidth / textureWidth;
+				height = RegionOriginalHeight / textureHeight;
 
 				for (int i = 0, n = uvs.Length; i < n; i += 2) {
 					uvs[i] = u + regionUVs[i] * width;